Materials Literature
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Experimentally, the intermetallic compound Mn4FeGe3 has been recently shown to exhibit enhanced magnetic properties and spin polarization compared to the Mn5Ge3 parent compound. The present ab initio study focuses on the effect of Fe substitution on the electronic and magnetic properties of the compound. Our calculati…
Lead-free piezoelectric ceramics based on x (Bi 1/2 Na 1/2 )TiO 3 – y (Bi 1/2 Li 1/2 )TiO 3 – z (Bi 1/2 K 1/2 )TiO 3 [ x + y + z = 1] (abbreviated as BNLKT100 y -100 z ) were prepared by conventional ceramic fabrication process. In this study, we clarified that the mechanical quality factor Q m of the rhombohedral sid…
Nanoscience and nanotechnology are considered to be the key technologies for the current century. Efforts are being made worldwide to create smart and intelligent textiles by incorporating various nanoparticles or creating nanostructured surfaces and nanofibres which lead to unprecedented level of textile performance,…
Manganese oxides, as an environmentally friendly material with various oxidation states, have a long history as an electrode material for batteries. Recently, a new energy storage system, supercapacitor, with its unique power density and energy density range, has been put in the focus. With a vast number of ongoing re…
We report on the improved performance of InP∕InGaAsP quantum-well waveguide solar cells via light scattering from deposited dielectric or metal nanoparticles. The integration of metal or dielectric nanoparticles above the quantum-well solar cell device is shown to couple normally incident light into lateral optical pr…
A discussion of a question, studied earlier by V.Veselago in 1967 and by J. Pendry in 2000, is given. The question is: can a slab of the material with negative refraction make a perfect lens? Pendry's conclusion was: yes, it can. Our conclusion is: no, in practice it cannot, because of the fluctuations of the refracti…
We report the existence of zero energy surface states localized at zigzag edges of $N$-layer graphene. Working within the tight-binding approximation, and using the simplest nearest-neighbor model, we derive the analytic solution for the wavefunctions of these peculiar surface states. It is shown that zero energy edge…
Titanium dioxide (TiO2) nanoparticles (NPs) are widely used in several manufactured products. The small size of NPs facilitates their uptake into cells as well as transcytosis across epithelial cells into blood and lymph circulation to reach different sites, such as the central nervous system. Different studies have s…
INTRODUCTION: The development of a living, autologous vascular graft with the ability to grow holds great promise for advancing the field of pediatric cardiothoracic surgery. OBJECTIVE: To evaluate the growth potential of a tissue-engineered vascular graft (TEVG) in a juvenile animal model. METHODS: Polyglycolic acid…
Stress corrosion cracking (SCC) of Alloy 600 (UNS N06600) and Alloys 182 (UNS W86182), 132 (UNS W86132), and 82 (UNS N06082) weld metals in high-temperature water is important because these materials are used widely in the pressurized water reactor (PWR) coolant system. Plant experience indicates that SCC will steadil…
The pressure (P) dependencies of both the thermopower (Seebeck effect) S and the electrical resistance (R) for p-type single crystals of Bi2Te3 and indium-doped bismuth telluride (InxBi2−xTe3,0.04≤x≤0.10) are reported on a pressure range of 0–8.5 GPa. The thermoelectric power factor (efficiency) (æ=S2/R) exhibits two…
While the importance of protein adsorption to materials surfaces is widely recognized, little is understood at this time regarding how to design surfaces to control protein adsorption behavior. All-atom empirical force field molecular simulation methods have enormous potential to address this problem by providing an a…
A yellow-emitting phosphor, La1−xCex3+Sr2AlO5, is reported that displays a peak in the excitation at 450nm and a peak in the emission at 556nm. When this phosphor is pumped by a blue InGaN light-emitting diode (λmax=450nm) we obtain white light with color rendering index (Ra) between 81 and 85 and color temperatures b…
Polymer–clay nanocomposites have attracted great attention worldwide from both academic and industrial points of view. This review aims at reporting on very recent developments in types of polymer–clay nanocomposites, their constituents, synthetic routes, properties and their uses as carriers for drug delivery. This n…
LiNbO 3 -doped (Na, K)NbO3 lead-free piezoceramics were prepared by conventional sintering at a temperature as low as 950 °C using excess Na2O additives. The crystal structure changed from orthorhombic to tetragonal with increasing LiNbO3 amount since the phase transition temperature TO−T shifted downward. In the regi…
Electrospinning has attracted tremendous interest in the research community as a simple and versatile technique to produce synthetic polymeric ultrafine fibres with diameters ranging from a few micrometres to tens of nanometres. Recently, some natural origin polymers have also been successfully electrospun. Owing to t…
Thermoelectric generators are all solid-state devices that convert heat into electricity. Unlike traditional dynamic heat engines, thermoelectric generators contain no moving parts and are completely silent. Such generators have been used reliably for over 30 years of maintenance-free operation in deep space probes su…
The coupled plasmon absorption of Au nanorod dimers is investigated as a function of the orientation between the long-axes of the nanorod by linking them with rigid and flexible molecules. As the angle between the Au nanorods increases, the coupled plasmon band shifts to longer wavelength confirming the role of effect…
Treatment of amorphous diphenylalanine thin film at high temperatures as 150 °C with aniline vapor under anhydrous condition results in the formation of vertically well-aligned nanowires. By combining the high-temperature aniline vapor aging method with a simple soft-lithographic technique, we could fabricate a micro-…
Abstract Multi‐walled carbon nanotubes (CNTs) and nitrogen‐doped carbon (CN x ) nanotubes have been synthesized by the aerosol‐assisted chemical vapour deposition (CVD) method. The samples were prepared from toluene and acetonitrile taken in different proportion. The structure of CNTs and CN x nanotubes was compared u…